ML18018B258

LER 78-009-01 for Nine Mile Point Unit 1 Regarding Replacement of Explosive Charges in the TIP Shear Valves with New Charges and the Resulting Unsatisfactory Ohmmeter Continuity Test for Acceptable Electric Contact

ML18018B258
Person / Time
Site:	Nine Mile Point
Issue date:	05/26/1978
From:	Schneider R Niagara Mohawk Power Corp
To:	Grier B NRC Region 1
References
LER 78-009-00 LER 78-009-01
Download: ML18018B258 (6)

Text

r /u(y,y REGULATORY INFORMATION DISTRIBUTIGN SYSTEM (RIDS DISTRIBUTION FOR INCOMING MATERIAL 50-220 REC: GRIER B H ORG: SCHNEIDER R R DOCDATE: 05/26/78 NRC NIAGARA MOHAWK PWR DATE RCVD: 06/07/78 DOCTYPE: LETTER NOTARIZED: NO COPIES RECEIVED

SUBJECT:

LTR i ENCL 1 FORWARDING LICENSEE EVENT REPT (RO 50-220/78-009) ON 02/2i/78 CONCERNING TIP SHEAR VALVES REPLACED WITH NEW CHARGES'HOWED OHMMETER CONTINUITY TEST FOR ACCEPTABLE ELEC CONTACT WAS UNSATISFACTORY... W/ATT.

PLANT NAME: NINE MILE PT, UNIT i REVIEWER INITIAL: X JM DISTRIBUTOR INITIAL:P~

++4HI+4~++++4F+++4++ DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS INCIDENT REPORTS

< DISTRIBUTION CODE A002)

FOR ACTION: BR~HIE ORBN3 BC~~W/4 ENCL INTERNAL: REG F IL fENCL

++W/2 ENCL NRC PDR+<W/ENCL MIPC++W/3 ENCL I 5 C SYSTEMS BR4<W/ENCL EMERGENCY PLAN BR44W/ENCL NOVAK/CHECK++W/ENCL EEB4 4W/ENCL AD FOR ENG+4W/ENCL PLANT SYSTEMS BR<+W/ENCL HANAUER+>W/ENCL AD FOR PLANT SYSTEMS+>W/ENCL AD FOR OPER TECH4+W/ENCL REACTOR SAFETY BR+<W/ENCL ENGINEERING BRw+W/ENCL VOLLMER/BUNCH+4W/ENCL KREGER/ J. COLLINS++W/ENCL POWER SYS BR++W/ENCL K SEYFRIT/IE+wW/ENCL EXTERNAL: LPDR S OSWEGO'Y44tW/ENCL T IC%+W/ENCL NSIC44W/ ENCL ACRS CAT B++W/i6 ENCL COPIES NOT SUBiJITTED PER REGULATORY'UIDE 10 F 1 DISTRIBUTION: LTR 45 ENCL 45 CONTROL NBR 78i600~24 SIZE: iP l.iP+2P

It I "I NIAGARA MOHAWK POWER CORPORATION/300 ERIE BOULEVARD WEST, SYRACUSE, N.Y. 13202/TELEPHONE (315) 474-1511 Wage 26, 1978 C

A,. Boyee, H. G/ci.E/L Nrcecto/L I,,)

Ueu."ed Statue Much ea/L Regulato/Ly CommQ dion ~CO Reg4.on I CAq)

Vl C Al 631 Pa/ck Avenue, Kmg o( P/curiam, PA. 19406

( CV C3 Pll RE: Pock& Mo. 50-220 Sea/L hh,. G/ci.E/LI In acco/cdance eke M~nc hKLc Poi1< Nucjea/c. S~on Urbe >1 T'cchrucat'. Speci.pcatLon5, cd he/ceby subvert Licensee. Event Repo/Lt LER 78-09 tRev~ion 1), c0&eh c0as p/Lev~oasZg submitted on hfa/cch 1, 1978.

TRQ /cepo/Lt cd completed in Xhe, )o/cmat designated an MUREG-0161, dated July 1977.

Velcro Wul,g gou46, ORIGINAL SIGNED BY R.R. SCHNEIDER R.R. Schneiden, Vi,cc P~e5<dcnt-ELec,tcc.ie P/coducti.oII Eneloau/ce, (3 eopi.c5) xc: O~mt'o/c, 0)Pce o) 'ISE (30 cop~M) 8~ceto/I,, 0(tIice. o$ WIPC (3 copiu) 78g 6003'~

NRC FORM 3GG U. S. NUCLEAH HEUULA I UHY UUMMlbbIEIN

{7-771 LICENSEE EVENT REPOR CONTROL BLOCK:

I 6 Q [PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) ~

~01 N Y NM P 1 Q2 0 0 - 0 0 0 0 0 - 0 0Q34 I QRLLJ Qs 7 8 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 C.'1'8 Pp CON'T

~OP 7 8 soURGE LL lQB 0 5 0 0 0 2 2 Q7 EVFNT DATE 74 Q8 ~05 75 2 6 7 REPORT DATE 8

80 Qs 60 61 DOCKET NUMBER GS G9 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10 Durin routine station o eration with the TIP detectors withdrawn ex-plosive charges in the TIP shear valves were re laced with new char es.

After re lacement, an ohmmeter continuit test for acce table electric

~OS contact'was unsatisfactory. The normal TIP isolation system was o er-

~os able at this time. An evaluation has shown that this condition could not

~0 "create. a otential for a safet hazard.

~OB 7- 8 80 SYSTEAI CAUSE CAUSE CONIP VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

~OS ~XX Q44 ~GOER ~AQE Y A L Y E X QE ~XQE ~X g<,

7 8 9 10 11 12 13 18 19 20 SCOUENTIAL OCCURRENCE REPORT REVISION OPT LERIRO REPQRT ACTION .FUTURE EVENT YEAR

~78 21 22 EFFECT

~

23 SHUTDOWN 24 REPORT NO.

~00 9 26

~~

27

~01 ATTACHMENT 28 CODE 29 NPRDQ TYPE

~T 30

~

31 PRIME COMP.

ND.

~l 32 COMPONEI9T TAKEN ACTION ON PLANT METHOD HOURS +22 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER 0 0 0 0 8 0 8 0

~NOPE ~ZOER 33 34

~ZQEO 35

~ZQEE 36 37 40 41 Y

On ~NOR 42 L~JOEE 43 44 47 Q

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 o It was found that the actual electrical connections as ori inall wired were not as described in the Maintenance Procedure or in a re-vised GE drawing. The wiring was chan ed to a ree with the revised GE..

dw . and all four of the old s uib devices were detonated successfull

~14 7 8 9 FACII.ITY STATUS AI POWER OTHER STATUS Q METHOD OF DISCOVERY DISCOVERY DESCRIPTION s E Q28 ~09 9 QEO Maintenance Procedure 7 8 9 10 12 44 45 4G 80 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITYQSS LOCATION OF RELEASE QB

~Z Q33 ~ZQ24 NA NA 7 8 9 10 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DCSCRIPTION Q30 T ~00 0 QET ~2Qas NA 7 8 9 'I1 12 13 80 PERSONNEL INJURIES 7 8 9 11 12 80 LOSS OF OR DAMAGE TO FACII.ITY TYPE DESCRIPTION Q43 0 Z Q42 NA 7

'I o

8 8

9 ISSUED

~NQ<<NA 9

10 PUBLICITY DESCRIPTION 10 Q PHONE'0 NRC USE ONLY 80 80 P

O.K. MacVittie 315-343-2110 X1558 0 NAME OF PREPARER , s7

NIAGARA MOHAWK POWER CORPORATION/300 ERIE BOULEVARD WEST, SYRACUSE. N.Y. 13202/TELEPHONE (315) 474 ~ 1511 blate 26, 1978 htIL. Bogee H. G/u.e/z

%Aero/z U~ed S~eh Nucleate Regulato/zg CommQ a~on Regin I 631 Pa/zfz Avenue, King os P/uL56~, PA. 19406 RE: Goclz& hlo. 50-220 LER 78-09/01T-1 one hLile Po~et NucLea/L Staf;ion UI~ <1 17eatL hk. Gru.e/L:

G~g /zozLtine a~on opercation wMh Che TIP d&ectom eLthd/zawn, explosive cha/zgu ~n Che TIP System ahea/L vaEvas we/ze rzeplaced eke neIv eha/zgu. The, explosive ope/Iated TIP ahea/LLeo~on vaEve5 a/ze a bactz-up ayhkem Co be used )o/LLsolatLon o( Che TIP Whee ~n Che eveILt ML6 noC possible W ~hd/Law .the, detecto/L ao Che no/ImaL automatic volation agkeIn may (unct'.on.

FoLEoeu1g /zeplacement', pe/Lfoenanee og hfau<enance PnocedIg/Le Nl-Ih)P-TIP-3 (ound Chat Xhe ohmmete/L eo~nuktg wa6 unbatQ (aetna.

tnt fo/L acceptable eLeet/u.c compact The, norImaL TIP Wbe Lsofation aIgaiem wa5 ope/Iable at'ke ~e.

IC wm ltound Chat She a~ eLectIu.eaL connectioIa Co She exploa~ve chatzge5 we/ze nok a5 de5c/u.bed ~n Che h(aintenanee PtzoceduIze. Gene/zaE ELecttu.c NE'0 Paodu& Se/zvace wa5 znfo/Imed o( 4he p/zoblen and gL ven Che numb@@ of She cbuueinga rued Co Ice .the agkem. A /zevke~oIz Co the dIzalinga, wtw.eh had o/u'.g~aLEy been msued ~n Feb~g 1968, wa5 Located.

The, con)~gurzation ahoIvn ~n 4kB rzevmion would cause .tke, chcuzgas Co pJce.

The w~g (o/L pru,ng Xhe eha/zgm ~n Xhe TIP Sgs.teIn wa5 changed Co match Chat shown ~n She /Levied cbuueinga. ALE o( Che old cluvzge5 we/Le CmX +fred w~ng the /Levied w~iI1g scheme. TheIg aEL /vied success(uLQg.

Ad~onaLEg, Eke Pae-Ope/LationaL TmC of ou/z Liquid PoQ on SgakenI wa5 rzev~ewed Co a5szI/ze Chat She explosive cheat. vaEve5 kn .that atgateJn had been opetzationaELg Ce54ed p/u.o/L .t'o ata/Ltup.

In aden to XlIe u&u'.ng p/zoblem uncove/Led, Lt Iver@ (ound Chat Xke 2 AMP fme5 /zeqc&ced .uc Clue squib ~cuit've/zeiI+WILt bloIv dev~ce5 xrvkead o) Che slow blow Xgpe apeciPed bg She vendo/z. ALE o( Xhe (tun Nze moI/w'.to/L/coI~ol u~ we/Le /replaced wMh new dev~ce5,

Page 2 The. TIP SgaCen inde coetainntmt ~ deigned Joc 124 prig wiCh Che.

baLL valve closed. 8uni>ig a, Loath o J coolm< accident, coetaiiuneet pcuame lou been calculaCed Co <each 95 prig. Fox a poCeetiuk aaJeCy pxoblem Co exQC dkutiwg a LOCA, Che TIP paobe wouLd have Co JaiL in Che imbed position, Che, TIP ~~neet aheaCh would have, Co btceak and Che, TIP cheart.

vaLve would have Co JmX Co Jme, Chas preventing TIP Cube Leo~on. A aaJeCy evaLuaCion o J Cps concKtion hm determined Chat Che poCeetiaL Jo< a aaJeCy hazcvzd do@5 noC exQC.

Sincerely yocuu, ORIGINAL SIGNED BY R.R. SCHNEIDER R.R. Schneideft, Vice PamidenC-ELe~c PaoducCion